Lens-clamping bracket for use with pince-nez glasses and spectacles



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Patented June 2l, 1927.

UNITED STATES PATENT OFFICE.

JULES LEFEVRE, OF PARIS, FRANCE.

LENS-CLAMPING BRACKET FOR USE WITH vPINCE-NEZ GLASSES AND SPECTACLES.

Application led June 25, 1924, Serial No. 722,230, and in France May 21, 1924.

This invention relates to lens clamping brackets tor pince-nez glasses and spectacles the characteristic of which is that they are not liable to become deformed.

In existing pince-nez glasses and spectacles, having lens clamping brackets, itis known that after a certain period of use, the glass mounted between the arms ot the bracket and bearing against its clamp, works loose with relation to the bracket, this arising from the fact that when the glass is wiped, the pince-nez or spectacle is held by the bracket, which, because ot relative strains which the'bracket and glass are subjected to with relation to one another, gives rise to the deformation of the clamp against which the glass no longer bears in a uniform manner, and thus interferes with the coincidence between its optical Vairis and the visual axis of the eye.

The present invention has for its obje-ct to remedy this inconvenience by rendering lthe clamp of the brackets non-deformable, notwithstanding the repeated strains on the glasses during wiping, by the fact that it comprises, Yfor this purpose, a reinforcing rib which prevents the clamp from opening and thereby preventing the glass from working loose in the bracket. It necessary, two or more reinforcing ribs, similar or not to one another may be provided.

In order that the invention may be clearly understood, one form of reducing the invention to practice by way of example, is hereinafter `described Vand illustrated diagrammatically in the accompanying drawing in which:

Figure 1 is a iront view of a pince-nez bracket.

Figure 2 is anienlarged side view of the clamp with a reinforcing rib.

Figure 3 is a horizontal ctional view along the line wof Figure 2, according to which the rib projects from the clamp and is solid, and

Figure lis a similar sectional view according to which the rib is beaten in or worked into the metal ot the clamp.

In carrying the invention into eilect, 1 indicates the glass bearing against the clamp 2, and iixed by a screw, between the two bracket arms 3, in the ordinary manner.

The clamp 2 bears externally and longitudinally a rib 4 which reinforces it and prevents its extremities from opening, in such a manner as to be always in exact engagement with the curve ot the glass l and without becoming deformed notwithstanding the strains incurred at the time of wiping.

The construction of this clamp 2 with a reinforcing rib 4,' could be etected either by its being produced by casting as shown in Figure 8, or by being beaten or worked as shown in Figure 4;, or by being moulded, and any suitable metal may be used. The rib 4. can also be providedor by autogenous soldering, or otherwise on the exterior iace of the clamp 2. p

What I claim is:

l. An improved non-deformable lens clamping vbracket for pince-nez glasses and spectacles having spaced bracket arms between which a lens may be disposed and clamped and also having a base portion eX- tending 'from the bracket arms arcuately in a direction. along the edge tace ot the clampedv lens, said base portion having a reinforcing y rib extending lengthwise of the same between the ends and projecting from the base portion in a plane substantially parallel to the plane ot the lens, whereby said `base portion will closely lit `and furnish an unyielding abutment for the clamped end of the lens.

2. A lens mounting comprising an element having Hanges extending along and engaging an edge of the lens and having clamping ears embracing and anchored to a portion of the lens, the flanges being formed of relatively thin material and having a reinforcing rib extending substantially in the plane ot the lens and in a direct-ion along the edge of the lens.

3. A lens mounting comprising a body portion having clamping ears embracing a portion of the lens and having flanged portions extending along and contacting with an edge ot the clamped lens,'said body portion and flanges being formed of thin material and having a portion along the edge ot the lens `doubled away Jtrom said lens edge to form a reinforcing ribextending along the flanges to prevent their flexure.

In witness whereof I hereunto subscribe my signature.

JULES LEFVRE. 

